Disposable nickel hydrogen battery negative electrode material, negative electrode piece, battery and preparation methods thereof

A nickel-metal hydride battery and negative electrode material technology, applied in the direction of alkaline battery electrodes, alkaline battery manufacturing, battery electrodes, etc., can solve problems such as pulverization, alloy cracks, etc., and achieve high efficiency, long discharge time, and convenient operation and use Effect

Inactive Publication Date: 2012-07-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its theoretical discharge specific capacity is about 370mAh / g, but it is affected by kinetics in the actual discharge process, which is often lower than the theoretical value, and LaNi 5 After hydrogen absorption, the metal lattice expands due to the hydrogen atoms entering the lattice gap, and after hydrogen release, the metal lattice shrinks again
Therefore, repeated hydrogen absorption and desorption will cause cracks and even pulverization of the alloy.
Therefore, there are many limitations in practical applications

Method used

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  • Disposable nickel hydrogen battery negative electrode material, negative electrode piece, battery and preparation methods thereof
  • Disposable nickel hydrogen battery negative electrode material, negative electrode piece, battery and preparation methods thereof
  • Disposable nickel hydrogen battery negative electrode material, negative electrode piece, battery and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Weigh 1.4142g LaNi respectively 5 , 0.0867gMgH 2 , 0.0635g nickel foam, 0.4998g nickel hydroxide powder, LaNi 5 , MgH 2 , Hydroxynickel powder is 200 mesh powder after sieving;

[0055] (2) Mix the powder evenly;

[0056] (3) Put the powder into the stuffing tank of the battery stamping system, the filling amount is half of the total amount of the above powder, then put a piece of nickel foam with a diameter of 10mm, and then put the remaining half of the powder into the tablet for tableting , to obtain a disc with a diameter of 10mm, the test force selected during the tablet pressing process is 15KN, and the pressure is maintained for 2min;

[0057] (4) take out above-mentioned wafer after sheet pressing is finished, then weld on a section of long be 10cm, wide be the nickel bar of 5mm with AC spot welding machine, make required negative plate;

[0058] (5) Wrap the disc welded with nickel strips with diaphragm paper with a length of 7.7cm and a width of 5cm, ...

Embodiment 2

[0062] (1) Weigh 1.4146g LaNi respectively 5 , 0.0863gMgH 2 , 0.0650g nickel foam, 1.0008g nickel hydroxide powder, LaNi 5 , MgH 2 , Hydroxynickel powder is 200 mesh powder after sieving;

[0063] (2) Then mix the powder evenly;

[0064] (3) Put the powder into the stuffing tank of the battery stamping system, the filling amount is half of the total amount of the above powder, and then put a piece of nickel foam with a diameter of 10mm, and then put the remaining half of the powder into the tablet , to obtain a disc with a diameter of 10mm, the test force selected during the tableting process was 15KN, and the pressure was kept for 2min;

[0065] (4) take out disc after sheet pressing is finished, then weld a section of long 10cm, wide nickel bar with 5mm with AC spot welding machine, make required negative plate;

[0066] (5) Wrap the disc welded with nickel strips with diaphragm paper with a length of 7.5cm and a width of 4cm, and put Ni(OH) on both sides of the diaphra...

Embodiment 3

[0070] (1) Weigh 1.2679gLaNi respectively 5 , 0.2316gMgH 2 , 0.0656g nickel foam, 2.0004g nickel hydroxide powder, LaNi 5 , MgH 2 , Hydroxynickel powder is 200 mesh powder after sieving;

[0071] (2) Then mix the powder evenly;

[0072] (3) Put the powder into the stuffing tank of the battery stamping system, the filling amount is half of the total amount of the above powder, and then put a piece of nickel foam with a diameter of 10mm, and then put the remaining half of the powder into the tablet , to obtain a disc with a diameter of 10mm, the test force selected during the tableting process was 15KN, and the pressure was kept for 2min;

[0073] (4) Take out the disc after the sheet pressing is completed, then weld a section of nickel strip with a length of 10cm and a width of 5mm with an AC electric welding machine to make the required negative electrode sheet;

[0074] (5) Wrap the disc welded with nickel strips with diaphragm paper with a length of 7.2cm and a width of...

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Abstract

The invention relates to a negative electrode material of a nickel hydrogen battery, and specifically relates to a disposable high-capacity replaceable nickel hydrogen battery negative electrode material. The invention also relates to a negative electrode piece, a nickel hydrogen electrode and preparation methods of the negative electrode piece and the nickel hydrogen electrode. The disposable nickel hydrogen battery negative electrode material comprises the following components in percentage by mass based on the total mass of the components: 35.56%-68.51% of LaNi5, 3.36%-8.03% of MgH2, 24.21%-56.10% of a bonding agent and 1.25%-3.08% of foam nickel. The negative electrode piece is made of the disposable nickel hydrogen battery negative electrode material, and the nickel hydrogen battery comprises the negative electrode piece. The method for preparing the negative electrode piece or the nickel hydrogen battery comprises the steps of mixing, piece pressing, welding and the like. According to the invention, the technical problems of the existing nickel hydrogen battery that the discharge specific capacity is low and the alloy is atomized easily are solved.

Description

technical field [0001] The invention relates to a negative electrode material for a nickel-hydrogen battery, in particular to a disposable high-capacity replaceable negative electrode material for a nickel-hydrogen battery; the invention also relates to a negative electrode sheet, a nickel-hydrogen electrode and a preparation method thereof. Background technique [0002] MH-Ni battery is a new generation of high-energy battery after Cd-Ni battery. Compared with Cd-Ni battery, the capacity of MH-Ni battery is increased by more than 50%, and it also eliminates the pollution of Cd to the environment. MH-Ni batteries are developed on the basis of high-voltage nickel-hydrogen batteries for aerospace. Due to the high pressure of high-voltage nickel-hydrogen batteries and the need for noble metals as catalysts, it is difficult to accept them for civilian use. Therefore, from the mid-1970s, the research work on civilian Ni-MH batteries began. In the 1980s, the Netherlands, Japan, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/24H01M4/26H01M10/30H01M10/28
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 邹建新谭剑波曾小勤丁文江
Owner SHANGHAI JIAO TONG UNIV
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